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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 630 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.The price of a school bag changes from ₹3660 to ₹4026. By what percent did it go up?
  2. 2.A water tank holds 3760 litres. 25% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹100. It goes up by 30%. What is the new price (in ₹)?
  4. 4.A water tank holds 840 litres. 15% of the water is used. How many litres are left?
  5. 5.A town has 3420 people. Its population grows by 40%. How many people live there now?
  6. 6.The price of a school bag changes from ₹1660 to ₹1826. By what percent did it go up?
  7. 7.The price of a school bag changes from ₹3060 to ₹2601. By what percent did it come down?
  8. 8.A water tank holds 1620 litres. 40% of the water is used. How many litres are left?
  9. 9.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 1160 litres. 50% of the water is used. How many litres are left?
  11. 11.A water tank holds 2080 litres. 15% of the water is used. How many litres are left?
  12. 12.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 920 litres. 5% of the water is used. How many litres are left?
  15. 15.A water tank holds 2920 litres. 25% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹400 to ₹600. By what percent did it go up?
  17. 17.A town has 4380 people. Its population grows by 30%. How many people live there now?
  18. 18.A town has 2640 people. Its population grows by 5%. How many people live there now?
  19. 19.The price of a school bag changes from ₹3900 to ₹4875. By what percent did it go up?
  20. 20.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?
  21. 21.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  22. 22.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.A water tank holds 2420 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 260 litres. 25% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹3780. It goes up by 5%. What is the new price (in ₹)?
  26. 26.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.A shop sells 2260 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  28. 28.A shop sells 4820 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  29. 29.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  30. 30.A shop sells 1600 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  31. 31.A water tank holds 4140 litres. 25% of the water is used. How many litres are left?
  32. 32.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  33. 33.The price of a bicycle is ₹2140. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹580 to ₹870. By what percent did it go up?
  36. 36.A town has 3780 people. Its population grows by 25%. How many people live there now?
  37. 37.A water tank holds 3700 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹1860 to ₹2790. By what percent did it go up?
  39. 39.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 10
  2. 2820
  3. 130
  4. 714
  5. 4788
  6. 10
  7. 15
  8. 972
  9. 21
  10. 580
  11. 1768
  12. 47
  13. 54
  14. 874
  15. 2190
  16. 50
  17. 5694
  18. 2772
  19. 25
  20. 1036
  21. 65
  22. 37
  23. 2299
  24. 195
  25. 3969
  26. 40
  27. 2825
  28. 6748
  29. 62.5
  30. 2080
  31. 3105
  32. 52.5
  33. 2461
  34. 28.75
  35. 50
  36. 4725
  37. 3330
  38. 50
  39. 96
  40. 75

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